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      alsa-plugins-1.2.2
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      <h4>
        Beyond Linux<sup>�</sup> From Scratch <span class="phrase">(System
        V</span> Edition) - Version 2020-04-02
      </h4>
      <h3>
        Chapter&nbsp;42.&nbsp;Multimedia Libraries and Drivers
      </h3>
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    <div class="sect1" lang="en" xml:lang="en">
      <h1 class="sect1">
        <a id="alsa-plugins" name="alsa-plugins"></a>alsa-plugins-1.2.2
      </h1>
      <div class="package" lang="en" xml:lang="en">
        <h2 class="sect2">
          Introduction to ALSA Plugins
        </h2>
        <p>
          The <span class="application">ALSA Plugins</span> package contains
          plugins for various audio libraries and sound servers.
        </p>
        <p>
          This package is known to build and work properly using an LFS-9.1
          platform.
        </p>
        <h3>
          Package Information
        </h3>
        <div class="itemizedlist">
          <ul class="compact">
            <li class="listitem">
              <p>
                Download (HTTP): <a class="ulink" href=
                "https://www.alsa-project.org/files/pub/plugins/alsa-plugins-1.2.2.tar.bz2">
                https://www.alsa-project.org/files/pub/plugins/alsa-plugins-1.2.2.tar.bz2</a>
              </p>
            </li>
            <li class="listitem">
              <p>
                Download (FTP): <a class="ulink" href=
                "ftp://ftp.alsa-project.org/pub/plugins/alsa-plugins-1.2.2.tar.bz2">
                ftp://ftp.alsa-project.org/pub/plugins/alsa-plugins-1.2.2.tar.bz2</a>
              </p>
            </li>
            <li class="listitem">
              <p>
                Download MD5 sum: 8455e3c6fbc47f62f070afabc14ba575
              </p>
            </li>
            <li class="listitem">
              <p>
                Download size: 400 KB
              </p>
            </li>
            <li class="listitem">
              <p>
                Estimated disk space required: 6.1 MB
              </p>
            </li>
            <li class="listitem">
              <p>
                Estimated build time: less than 0.1 SBU
              </p>
            </li>
          </ul>
        </div>
        <h3>
          ALSA Plugins Dependencies
        </h3>
        <h4>
          Required
        </h4>
        <p class="required">
          <a class="xref" href="alsa-lib.html" title=
          "alsa-lib-1.2.2">alsa-lib-1.2.2</a>
        </p>
        <h4>
          Optional
        </h4>
        <p class="optional">
          <a class="xref" href="ffmpeg.html" title=
          "FFmpeg-4.2.2">FFmpeg-4.2.2</a>, <a class="xref" href=
          "libsamplerate.html" title=
          "libsamplerate-0.1.9">libsamplerate-0.1.9</a>, <a class="xref"
          href="pulseaudio.html" title="PulseAudio-13.0">PulseAudio-13.0</a>,
          <a class="xref" href="speex.html" title=
          "Speex-1.2.0">Speex-1.2.0</a>, <a class="ulink" href=
          "http://jackaudio.org/">JACK</a>, <a class="ulink" href=
          "https://github.com/AVnu/libavtp/">libavtp</a>, and <a class=
          "ulink" href="http://maemo.org/">maemo</a>
        </p>
        <p class="usernotes">
          User Notes: <a class="ulink" href=
          "http://wiki.linuxfromscratch.org/blfs/wiki/alsa-plugins">http://wiki.linuxfromscratch.org/blfs/wiki/alsa-plugins</a>
        </p>
      </div>
      <div class="installation" lang="en" xml:lang="en">
        <h2 class="sect2">
          Installation of ALSA Plugins
        </h2>
        <p>
          Install <span class="application">ALSA Plugins</span> by running
          the following commands:
        </p>
        <pre class="userinput">
<kbd class="command">./configure --sysconfdir=/etc &amp;&amp;
make</kbd>
</pre>
        <p>
          This package does not come with a test suite.
        </p>
        <p>
          Now, as the <code class="systemitem">root</code> user:
        </p>
        <pre class="root">
<kbd class="command">make install</kbd>
</pre>
      </div>
      <div class="content" lang="en" xml:lang="en">
        <h2 class="sect2">
          Contents
        </h2>
        <div class="segmentedlist">
          <div class="seglistitem">
            <div class="seg">
              <strong class="segtitle">Installed Programs:</strong>
              <span class="segbody">None</span>
            </div>
            <div class="seg">
              <strong class="segtitle">Installed Libraries:</strong>
              <span class="segbody">Numerous libasound_module_<em class=
              "replaceable"><code>&lt;module&gt;</code></em>.so modules
              including conf_pulse, ctl_arcam_av, ctl_oss, ctl_pulse,
              pcm_a52, pcm_jack, pcm_oss, pcm_pulse, pcm_speex, pcm_upmix,
              pcm_usb_stream, pcm_vdownmix, rate_lavrate*, rate_samplerate*,
              and rate_speexrate*</span>
            </div>
            <div class="seg">
              <strong class="segtitle">Installed Directories:</strong>
              <span class="segbody">None</span>
            </div>
          </div>
        </div>
        <div class="variablelist">
          <h3>
            Short Descriptions
          </h3>
          <table border="0" class="variablelist">
            <colgroup>
              <col align="left" valign="top" />
              <col />
            </colgroup>
            <tbody>
              <tr>
                <td>
                  <p>
                    <a id="libasound_module_pcm_oss.so" name=
                    "libasound_module_pcm_oss.so"></a><span class=
                    "term"><code class=
                    "filename">libasound_module_pcm_oss.so</code></span>
                  </p>
                </td>
                <td>
                  <p>
                    Allows native <span class="application">ALSA</span>
                    applications to run on <span class=
                    "application">OSS</span>.
                  </p>
                </td>
              </tr>
              <tr>
                <td>
                  <p>
                    <a id="libasound_module_pcm_upmix.so" name=
                    "libasound_module_pcm_upmix.so"></a><span class=
                    "term"><code class=
                    "filename">libasound_module_pcm_upmix.so</code></span>
                  </p>
                </td>
                <td>
                  <p>
                    Allows upmixing sound to 4 or 6 channels.
                  </p>
                </td>
              </tr>
              <tr>
                <td>
                  <p>
                    <a id="libasound_module_pcm_vdownmix.so" name=
                    "libasound_module_pcm_vdownmix.so"></a><span class=
                    "term"><code class=
                    "filename">libasound_module_pcm_vdownmix.so</code></span>
                  </p>
                </td>
                <td>
                  <p>
                    Allows downmixing sound from 4-6 channels to 2 channel
                    stereo output.
                  </p>
                </td>
              </tr>
              <tr>
                <td>
                  <p>
                    <a id="libasound_module_pcm_jack.so" name=
                    "libasound_module_pcm_jack.so"></a><span class=
                    "term"><code class=
                    "filename">libasound_module_pcm_jack.so</code></span>
                  </p>
                </td>
                <td>
                  <p>
                    Allows native <span class="application">ALSA</span>
                    applications to work with <span class=
                    "command"><strong>jackd</strong></span>.
                  </p>
                </td>
              </tr>
              <tr>
                <td>
                  <p>
                    <a id="libasound_module_pcm_pulse.so" name=
                    "libasound_module_pcm_pulse.so"></a><span class=
                    "term"><code class=
                    "filename">libasound_module_pcm_pulse.so</code></span>
                  </p>
                </td>
                <td>
                  <p>
                    Allows native <span class="application">ALSA</span>
                    applications to access a <span class=
                    "application">PulseAudio</span> sound daemon.
                  </p>
                </td>
              </tr>
              <tr>
                <td>
                  <p>
                    <a id="libasound_module_pcm_a52.so" name=
                    "libasound_module_pcm_a52.so"></a><span class=
                    "term"><code class=
                    "filename">libasound_module_pcm_a52.so</code></span>
                  </p>
                </td>
                <td>
                  <p>
                    Converts S16 linear sound format to A52 compressed format
                    and sends it to an SPDIF output.
                  </p>
                </td>
              </tr>
              <tr>
                <td>
                  <p>
                    <a id="libasound_module_rate_samplerate.so" name=
                    "libasound_module_rate_samplerate.so"></a><span class=
                    "term"><code class=
                    "filename">libasound_module_rate_samplerate.so</code></span>
                  </p>
                </td>
                <td>
                  <p>
                    Provides an external rate converter through <code class=
                    "filename">libsamplerate</code>.
                  </p>
                </td>
              </tr>
            </tbody>
          </table>
        </div>
      </div>
      <p class="updated">
        Last updated on 2020-03-02 11:46:47 -0600
      </p>
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